delta/haskell.git/docs, branch wip/stringbuffer gitlab.haskell.org: ghc/ghc.git Implement -ddump-c-backend argument 2020-11-22T11:28:10+00:00 Ben Gamari ben@smart-cactus.org 2020-11-20T22:31:57+00:00 bc9c3916df96a20c58b91fd383a0da77ec83c4b0 To dump output of the C backend. 
To dump output of the C backend.
rts: Post ticky entry counts to the eventlog 2020-11-21T18:13:29+00:00 Ben Gamari ben@smart-cactus.org 2020-04-14T01:12:53+00:00 7e93ae8b2257c17d5ae5ef7832db723e897c8e8b We currently only post the entry counters, not the other global counters as in my experience the former are more useful. We use the heap profiler's census period to decide when to dump. Also spruces up the documentation surrounding ticky-ticky a bit. 
We currently only post the entry counters, not the other global
counters as in my experience the former are more useful. We use the heap
profiler's census period to decide when to dump.

Also spruces up the documentation surrounding ticky-ticky a bit.
Move Plugins into HscEnv (#17957) 2020-11-21T06:14:09+00:00 Sylvain Henry sylvain@haskus.fr 2020-11-03T11:04:53+00:00 ecfd0278cb811c93853c176fe5df60222d1a8fb5 Loaded plugins have nothing to do in DynFlags so this patch moves them into HscEnv (session state). "DynFlags plugins" become "Driver plugins" to still be able to register static plugins. Bump haddock submodule 
Loaded plugins have nothing to do in DynFlags so this patch moves them
into HscEnv (session state).

"DynFlags plugins" become "Driver plugins" to still be able to register
static plugins.

Bump haddock submodule
Introduce -fprof-callers flag 2020-11-21T06:13:26+00:00 Ben Gamari ben@smart-cactus.org 2020-08-12T18:07:34+00:00 53ad67eacacde8fde452f1a323d5886183375182 This introducing a new compiler flag to provide a convenient way to introduce profiler cost-centers on all occurrences of the named identifier. Closes #18566. 
This introducing a new compiler flag to provide a convenient way to
introduce profiler cost-centers on all occurrences of the named
identifier.

Closes #18566.
users-guide: A bit of clean-up in profiling flag documentation 2020-11-21T06:13:26+00:00 Ben Gamari ben@smart-cactus.org 2020-11-11T20:51:50+00:00 2a8a979c24fe34a81a438ae179693ddaca12709f 






Update user's guide entry on demand analysis and worker/wrapper
2020-11-20T07:09:51+00:00

Sebastian Graf
sebastian.graf@kit.edu

2020-11-10T12:20:04+00:00

3a55b3a2574f913d046f3a6f82db48d7f6df32e3

The demand signature notation has been undocumented for a long time.
The only source to understand it, apart from reading the `Outputable`
instance, has been an outdated wiki page.

Since the previous commits have reworked the demand lattice, I took
it as an opportunity to also write some documentation about notation.





The demand signature notation has been undocumented for a long time.
The only source to understand it, apart from reading the `Outputable`
instance, has been an outdated wiki page.

Since the previous commits have reworked the demand lattice, I took
it as an opportunity to also write some documentation about notation.







Clarify interruptible FFI wrt masking state
2020-11-20T07:09:16+00:00

Kamil Dworakowski
kamil@dworakowski.name

2020-10-23T12:18:33+00:00

b57845c3d80f5bed8f498f27fb7a318f2b2f8b2c












nativeGen/dwarf: Only produce DW_AT_source_note DIEs in -g3
2020-11-15T08:35:45+00:00

Ben Gamari
ben@smart-cactus.org

2019-12-27T04:41:04+00:00

1e19183d08a3312ac2331b8284d17bc17170a51e

Standard debugging tools don't know how to understand these so let's not
produce them unless asked.





Standard debugging tools don't know how to understand these so let's not
produce them unless asked.







Enable -fexpose-internal-symbols when debug level >=2
2020-11-11T08:20:00+00:00

Ben Gamari
ben@smart-cactus.org

2020-03-18T19:54:35+00:00

584058ddff71460023712a8d816b83b581e6e78f

This seems like a reasonable default as the object file size increases
by around 5%.





This seems like a reasonable default as the object file size increases
by around 5%.







codeGen: Produce local symbols for module-internal functions
2020-11-11T08:20:00+00:00

Ben Gamari
ben@smart-cactus.org

2019-12-27T17:38:27+00:00

c6264a2d652517954b7cd076c7bc4487ed17c97d

It turns out that some important native debugging/profiling tools (e.g.
perf) rely only on symbol tables for function name resolution (as
opposed to using DWARF DIEs). However, previously GHC would emit
temporary symbols (e.g. `.La42b`) to identify module-internal
entities. Such symbols are dropped during linking and therefore not
visible to runtime tools (in addition to having rather un-helpful unique
names). For instance, `perf report` would often end up attributing all
cost to the libc `frame_dummy` symbol since Haskell code was no covered
by any proper symbol (see #17605).

We now rather follow the model of C compilers and emit
descriptively-named local symbols for module internal things. Since this
will increase object file size this behavior can be disabled with the
`-fno-expose-internal-symbols` flag.

With this `perf record` can finally be used against Haskell executables.
Even more, with `-g3` `perf annotate` provides inline source code.





It turns out that some important native debugging/profiling tools (e.g.
perf) rely only on symbol tables for function name resolution (as
opposed to using DWARF DIEs). However, previously GHC would emit
temporary symbols (e.g. `.La42b`) to identify module-internal
entities. Such symbols are dropped during linking and therefore not
visible to runtime tools (in addition to having rather un-helpful unique
names). For instance, `perf report` would often end up attributing all
cost to the libc `frame_dummy` symbol since Haskell code was no covered
by any proper symbol (see #17605).

We now rather follow the model of C compilers and emit
descriptively-named local symbols for module internal things. Since this
will increase object file size this behavior can be disabled with the
`-fno-expose-internal-symbols` flag.

With this `perf record` can finally be used against Haskell executables.
Even more, with `-g3` `perf annotate` provides inline source code.